Code of Federal Regulations

Title 14 - Aeronautics and Space
Volume: 1Date: 2023-01-01Original Date: 2023-01-01Title: Section 27.1013 - Oil tanks.Context: Title 14 - Aeronautics and Space. CHAPTER I - FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION. SUBCHAPTER C - AIRCRAFT. PART 27 - AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT. Subpart E - Powerplant. - Oil System.
§ 27.1013 Oil tanks. Each oil tank must be designed and installed so that— (a) It can withstand, without failure, each vibration, inertia, fluid, and structural load expected in operation; (b) [Reserved] (c) Where used with a reciprocating engine, it has an expansion space of not less than the greater of 10 percent of the tank capacity or 0.5 gallon, and where used with a turbine engine, it has an expansion space of not less than 10 percent of the tank capacity. (d) It is impossible to fill the tank expansion space inadvertently with the rotorcraft in the normal ground attitude; (e) Adequate venting is provided; and (f) There are means in the filler opening to prevent oil overflow from entering the oil tank compartment. [Doc. No. 5074, 29 FR 15695, Nov. 24, 1964, as amended by Amdt. 27–9, 39 FR 35461, Oct. 1, 1974]